package ch8;

/**
 * Created by lyk on 2016/10/7.
 * Package name: ch8
 * Porject name: untitled1
 */

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
 * @version 1.33 2007-06-12
 * @author Cay Horstmann
 */
public class ButtonTest
{
    public static void main(String[] args)
    {
        EventQueue.invokeLater(new Runnable()
        {
            public void run()
            {
                ButtonFrame frame = new ButtonFrame();
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.setVisible(true);
            }
        });
    }
}

/**
 * A frame with a button panel
 */
class ButtonFrame extends JFrame
{
    public ButtonFrame()
    {
        setTitle("ButtonTest");
        setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

        // create buttons
        JButton yellowButton = new JButton("Yellow");
        JButton blueButton = new JButton("Blue");
        JButton redButton = new JButton("Red");

        buttonPanel = new JPanel();

        // add buttons to panel
        buttonPanel.add(yellowButton);
        buttonPanel.add(blueButton);
        buttonPanel.add(redButton);

        // add panel to frame
        add(buttonPanel);

        // create button actions
        ColorAction yellowAction = new ColorAction(Color.YELLOW);
        ColorAction blueAction = new ColorAction(Color.BLUE);
        ColorAction redAction = new ColorAction(Color.RED);

        // associate actions with buttons
        yellowButton.addActionListener(yellowAction);
        blueButton.addActionListener(blueAction);
        redButton.addActionListener(redAction);
    }

    /**
     * An action listener that sets the panel's background color.
     */
    private class ColorAction implements ActionListener
    {
        public ColorAction(Color c)
        {
            backgroundColor = c;
        }

        public void actionPerformed(ActionEvent event)
        {
            buttonPanel.setBackground(backgroundColor);
        }

        private Color backgroundColor;
    }

    private JPanel buttonPanel;

    public static final int DEFAULT_WIDTH = 300;
    public static final int DEFAULT_HEIGHT = 200;
}